The Episode 3: Hell is Empty Add-on for Life is Strange: Before The Storm has 12 achievements worth 400 gamerscore.
Complete Episode 3: Hell Is Empty
Complete Episode 1, Episode 2 and Episode 3 of Life is Strange: Before the Storm
Complete the optional graffiti #10 in Episode 3: Hell Is Empty
Complete the optional graffiti #9 in Episode 3: Hell Is Empty
Complete the optional graffiti #8 in Episode 3: Hell Is Empty
Complete the optional graffiti #6 in Episode 3: Hell Is Empty
Complete the optional graffiti #7 in Episode 3: Hell Is Empty
Complete the optional graffiti #5 in Episode 3: Hell Is Empty
Complete the optional graffiti #4 in Episode 3: Hell Is Empty
Complete the optional graffiti #3 in Episode 3: Hell Is Empty
Complete the optional graffiti #2 in Episode 3: Hell Is Empty
Complete the optional graffiti #1 in Episode 3: Hell Is Empty